Contributions to economic geology, 1907: Part II.-Coal and Lignite
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Subjects
Subjects
Coal
Coal -- New Mexico -- McKinley County
Coal -- Oregon -- Morrow County
Coal -- Oregon -- Rouge River Valley
Geology
Geology, Economic
Geology, Economic -- United States
Geology -- United States
Mines and mineral resources
Mines and mineral resources -- New Mexico
Mines and mineral resources -- Oregon
Mines and mineral resources -- United States
Coal -- New Mexico -- McKinley County
Coal -- Oregon -- Morrow County
Coal -- Oregon -- Rouge River Valley
Geology
Geology, Economic
Geology, Economic -- United States
Geology -- United States
Mines and mineral resources
Mines and mineral resources -- New Mexico
Mines and mineral resources -- Oregon
Mines and mineral resources -- United States
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